Hello
Interpolation throws an error
(Interpolation::udeg: Interpolation on unstructured grids is currently only supported for InterpolationOrder->1 or InterpolationOrder->All. Order will be reduced to 1.) when called on an unstructured grid. However, I get either nothing or an error when I try the suggested interpolation orders. Am I doing something wrong, or is this a bug?
Example data for interpolationGrid is given at the end of the post.
Works:
interp = Interpolation[interpolationGrid] (*works just fine*)
interp[0.5, 1.5]
Throws error
rinterp = Interpolation[Reverse /@ interpolationGrid] (*throws the Interpolation::udeg: error*)
Interpolation does not throw an error, but returns an InterpolatingFunction that
looks right but throws an error when used
rinterp = Interpolation[Reverse /@ interpolationGrid, InterpolationOrder -> All]
rinterp[-10, -50] (* throws Thread::tdlen: Objects of unequal length *)
Interpolation does not throw an error, but doesn't return a valid InterpolatingFunction:
rinterp = rinterp =Interpolation[Reverse /@ interpolationGrid, InterpolationOrder -> 1]
Example data:
interpolationGrid={{{0, 0}, {-46.469, -52.2776}}, {{0, 1}, {-42.9885, -37.615}}, {{0,
2}, {-39.5618, -24.7261}}, {{0, 3}, {-35.8436, -13.4413}}, {{1,
0}, {-41.014, -61.5209}}, {{1, 1}, {-38.638, -45.0776}}, {{1,
2}, {-35.7402, -29.7835}}, {{1, 3}, {-32.0293, -16.0146}}, {{2,
0}, {-31.049, -69.8602}}, {{2, 1}, {-29.9241, -52.3672}}, {{2,
2}, {-28.4003, -35.5004}}, {{2, 3}, {-25.9637, -19.4728}}, {{3,
0}, {-16.8131, -75.6591}}, {{3, 1}, {-16.5981, -58.0934}}, {{3,
2}, {-16.3716, -40.929}}, {{3, 3}, {-15.9872, -23.9808}}}
